My two cents
Using a digital whiteboard app like Miro or Mural can be a great way to make your service blueprint easier to explore and more interactive. Here are a few ideas to do that:
Offer different levels of summaries: for example, in Miro, you can hide certain frames at first and let people unhide them once they are interested
Make it interactive: you can help people to navigate through your blueprint by using clickable buttons that bring people to other parts of the blueprint.
Add video explanations: for example, you could embed Loom videos where you record yourself and your screen and explain how the document works or a specific part of the document.
Link to documents: within the blueprint, you can link to documents to go further, like user research reports, personas, etc.
To go further, I've created a tiny course that helps you to learn which features and tips will help you use Miro, my favourite digital whiteboard tool, like a real innovation nerd.
And if you are not a fan of Miro, I have curated a list of digital whiteboard tools here.